is a type of Internet forum
that revolves around the posting of images, often alongside related text and discussion. The first imageboards were created in Japan
as an extension of the textboard
concept. These sites later inspired the creation of a number of English language
imageboards, such as 4chan.
Imageboards, similar to bulletin board systems, are used for discussions of a variety of topics. The primary focus of imageboards, however, is directed away from text posts, and is instead placed on picture posts. The two share many of the same structures, including separate forums for separate topics, as well as similar audiences. Imageboards are much more transitory with content—on some boards (especially highly trafficked ones), the thread deletion time can be as little as 10 minutes. In Japan
, where imageboards are more common, topics will vary widely, ranging from
to current news
. The most popular English language
imageboard, 4chan, similarly has a large variety of topics.
Imageboards are also different from online galleries in that most of the works posted are not made by the poster, but instead are taken from other online sources: galleries, other imageboards, and edited pictures.
Most imageboards and 2channel-style discussion boards allow (and encourage)
and use a system of tripcodes
instead of registration. A tripcode is the Hash function
result of a password that allows one's identity to be recognized without storing any data about users. Entering a particular password will let one "sign" one's posts with the tripcode generated from that password. Trying to take another user's tripcode and compute their password from it (for instance, to make posts that appear to come from a particular person) is somewhat computationally difficult. For those who want a custom tripcode, however, there are custom tripcode generators (which are technically tripcode crackers) available, such as Meriken's Tripcode Engine
In general, anonymity is considered to be one of the advantages of an imageboard, and some boards have from time to time removed the ability to post with a name altogether (known as "forced anonymous/anonymity").
Due to the fact tripcodes can be cracked given enough time, some imageboards, such as 4chan and 8chan, implement a "secure" tripcode.
Such tripcodes are not reproducible across different imageboards; they work by prepending a secure salt to the tripcode, barring Security hacker
, known only to the server owner.
They therefore function closer to a username
than to a cryptographic signature; this is why QAnon
could not verify themselves on another website when 8chan went down in late 2019.
There are two primary types of imageboard software packages in widespread use: linearly directed imageboards modeled closely after Futaba Channel (in which content is posted through hierarchical subsections of topical interest, usually denoted by a forward slash such as "/f" for female), and nonlinear imageboards modeled after Danbooru (usually indicated by the usage of controlled folksonomy
vocabulary for topical tagging and search).
Futaba Channel clones
There are currently several Futaba-based imageboard software packages in widespread use: Futallaby
, Kusaba X
Futallaby is a PHP script based on the Futaba script from Futaba Channel. Although the Futallaby source is still freely available at 1chan,
it is no longer in development, and the download page recommends using Wakaba instead, stating that "Wakaba can do everything Futallaby does and so much more." Futallaby started as a translation of Futaba, later retooled to support XHTML and customizable CSS styles. It is mostly notable for being the first open source English imageboard script.
Wakaba is a Perl imageboard script with a SQL backend to store thread information.
It is designed to be more efficient and cleanly written than other scripts that are available, while preserving the same kind of functionality. Wakaba is one of the most popular western imageboard software scripts, used most notably by 420chan and iichan ( Wakachan). Because of its focus on bare-bones functionality, Wakaba lacks many of the modern amenities provided by 4chan's Yotsuba, and newer imageboard scripts. A few users have attempted to remedy this by forking the original project and adding in features they consider beneficial. Two FOSS examples of this are frankusr's Wakaba fork, and the user experience focused Glaukaba.
Taimaba is 420chan's continuation of Wakaba, overhauling it with many modern features and a public API. It is a hybrid Perl and PHP platform, as compared to Wakaba's static html output. This fork remains in use today.
Kusaba was a modular imageboard software written in PHP, which used MySQL.
The creator has discontinued the project, however, and recommends TinyIB instead.
Kusaba X is a continuation of Kusaba. Like Kusaba, Kusaba X is written in PHP, and is designed with modularity in mind. It requires a MySQL or SQLite database to run. Kusaba and its derivatives were at one time some of the most popular imageboard solutions. Kusaba X has since fallen out of active development, and has not been updated since July 2011.
Tinyboard is a PHP based imageboard script with a MySQL backend.
Usually referred to as a "" (plural "boorus"). Unlike Futaba-inspired imageboard software packages, Danbooru and derivatives aim for a non-hierarchical semantic structure in which users are able to post content and add tags, annotations, translations, artist commentary, and comments.
There exist a number of different Danbooru-style imageboards, both those with shared source code and those that are not released for others to use. The two main Danbooru derivatives are Gelbooru and MyImouto.
|+ Traits of Danbooru-style imageboards
! Shared !! Software !! Programmed in !! License !! Notes|
|Uses MySQL by default (as part of LAMP), can also use PostgreSQL.|
|Uses MySQL. Built to replace Danbooru because author considered Ruby unsuitable.|[From Readme of the source code.]
|Uses MySQL. PHP port of Moebooru. Uses a custom Ruby-on-Rails-like framework.|[From Readme of the source code.]
|Uses MySQL. Modified and re-designed port of MyImouto for the Sequenzia Project.|[From Sequenzia Project Wiki page.] Some code is specialised for the Sequenzia Project and AC Research. [From Readme of the source.]
|Uses PostgreSQL, Elasticsearch and the Phoenix Framework. Successor to booru-on-rails.|
|Uses PostgreSQL, used to use MongoDB. Has been superseded by Philomena and is no longer actively developed as of December 2019.|
|Uses MySQL. Gelbooru 0.1.x is open source but 0.2.x currently is not.|
|(temporarily down due to host server issues) (download link removed as it leads to a phishing scam)|
An English-language imageboard based on cannabis
which was created on 20 April 2005 by Aubrey Cottle. The name is a reference to the larger 4chan
and the code term 420
of the cannabis subculture
. Its boards include various drug-specific boards,
as well as a board featuring a chatbot
4chan is an English-language imageboard based on the Japanese imageboard Futaba Channel. This imageboard is based primarily upon the posting of pictures (generally related to a wide variety of topics, from anime and popular culture to politics and sports) and their discussion. The Guardian
describes it as "at once brilliant, ridiculous and alarming."
The site and its userbase have received attention from the media for a number of reasons, including attacks against Hal Turner on his Internet shows,
distributed denial-of-service attacks against eBaum's World, taking part in Project Chanology, and multiple cases of Animal abuse.
Many have originated there, including lolcats,
["Lolcats' demented captions create a new Web language", Tamara Ikenberg, The News Journal, 9 July 2007] rickrolling, and Pedobear.
8chan (or Infinitechan) was a primarily English-language imageboard, although it has sub-boards dedicated to other languages. Just like 4chan, 8chan is based on posting pictures and discussion anonymously, but unlike 4chan, 8chan lets its users decide what they want to discuss by allowing any user to create their own board dedicated to any topic, a concept first made popular by news bulletin boards like Reddit
. 8chan also claims to have a strong dedication to freedom of speech and allows all content—so long as the discussion and board creation abides by United States law.
However, local moderators enforce the rules of their own boards and may delete posts as they see fit. It is currently partnered with the Japanese textboard
(ふたば☆ちゃんねる), or "Futaba" for short, is a popular, anonymous BBS and imageboard system based in Japan
. Its boards usually do not distinguish between not safe for work
content, but there is a strict barrier between two-dimensional (drawn) and three-dimensional (computer graphics (CG) and photographic) pictures that is heavily enforced and debated.
[ 2chan.net Futaba Channel]
Hispachan was launched in November 2012
[ Hispachan's History ]
as a global imageboard for Hispanophone
. Vice Magazine describes it as "a site for completely anonymous Spanish-language discussion that has proven popular among hackers since its launch in 2012".
[ "This Murder Has Exposed the Dark Side of Mexico’s Hacking Community" Vice News.]
In January 2017 a shooting in a school in Monterrey (Mexico) was previously announced on Hispachan.
[ "Agresor en colegio de Monterrey pudo anunciar ataque en foro" Excelsior. ]
In June 2019 Vice Magazine accused Hispachan of being a "collaborative misogyny" website.
[ "Hispachan: el foro español donde se difunden imágenes sexuales de mujeres y menores sin que nadie lo impida" VICE Spain.]
Founded in late 2007 after a long chat on IRC among a few Italian anons from 4chan
who wanted to make their presence more organised, Diochan is the largest Italian imageboard. It is still active as of August 2020.
The name "Diochan" is a portmanteau of the words Dio (God) and chan, meant as a play on a regional variant of one of the most popular blasphemous expressions in Italian.
Ptchan is a Portuguese-language imageboard founded in 2010 dedicated to Portugal and Portuguese-speaking countries like Angola and Mozambique; it also contains an international section and one only for Brazilian users.
55chan is the largest Brazilian imageboard.
Karachan is the largest Polish imageboard at 20 million posts, founded in 2010. Karachan has received attention from the Polish media after many trolling
actions targeting Polish politicians
and the Pope John Paul II.
As of July 2019 the site consists of a (Polish-language) faux page claiming the site is "blocked" due to "invalid content". However, a manual is known to exist, informing how to enter the actual forum and browse its contents.
Its name comes from the Polish word karaczan
, which means a cockroach
, an insect that is used as Karachan's logo.
A primarily German-language imageboard that was founded in 2007.
The name is an allusion to the ethnophaulism Kraut
for Germans. Unlike most imageboards, posters on Krautchan didn't publish their postings under the generic name "Anonymous". The German name "Bernd
" was used instead, and the Krautchan community identified themselves as "Bernds" instead of "Anons". In 2009, after the Winnenden school shooting, the interior minister of Baden-Württemberg cited a post on the imageboard in a press conference that appeared to forewarn of the shooting, but was later found to be fake.
The site also featured a popular English-language
board, /int/, which was also the origin of the Polandball
internet phenomenon and a number of other popular Internet meme
such as Wojak
in August the same year. On March 21, 2018 the imageboard was shut down. Two days later the imageboard kohlchan
was founded as a replacement. Attempts to view the latter via Google translate are redirected to NSFW content.
is a Russian imageboard that replaced 2ch.ru imageboard (originally known as dvach) which was shut down earlier on January 17, 2009; it thoroughly copied original Page layout
and was heavily advertised over the internet and managed to succeed the original one in popularity.
According to its owners number of posts left in the /b/ board exceeded 150 million.
In September 2016 a pro-Russian government organisation MAIL.RU helped to organize "defense" against alleged DDOS attacks that took place during the same month; events raised concerns and speculations among users who grew suspicious over alleged takeover committed by the mail.ru and who criticized owner's controversial decision to accept "help".
As of October 2018 It was widely believed that imageboard was simply "sold" on undisclosed terms to pro-government organisation.
The decision was met with high criticism of risks of Privacy
of users' credentials in inherently anonymous-community to the government body that could potentially violate principles of anonymity urging many to leave the board by the end of 2016. In October 2018 users from Dvach disclosed true identity of one of suspects who was allegedly involved in poisoning of ex-Russian spy and other British subjects in Salisbury
. Users from dvach emailed several Bellingcat
investigators to whom they provided public photos of him showing his real name on board of honorably awarded military serviceman and his participation in public events in Russian .
By 2019 it remains among the largest active Russian-speaking imageboards.
Wizardchan is an imageboard primarily dedicated to male virgin culture and topics including anime, hobbies, and depression. Users on the depression board often discuss suicide
, and a controversy emerged in the board's community about whether to refer users to crisis hotline
Ylilauta is a Finnish-language imageboard that was founded in 2011 with the merger of the two most popular Finnish imageboards, Kotilauta and Lauta.net.